<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			/*
			图片高度任然是200px，但是div的高度变为400px
			*/
			.a{
				line-height: 400px;
				width: 400px;
				border: 1px red solid;
			}
		</style>
	</head>
	<body>
		<div class="a">
			<img src="../img/1.jpg" height="200">
		</div>
	</body>
</html>
